diff --git a/sys/kern/vfs_nlookup.c b/sys/kern/vfs_nlookup.c
index ab7df39..4d7141b 100644
--- a/sys/kern/vfs_nlookup.c
+++ b/sys/kern/vfs_nlookup.c
@@ -469,14 +469,15 @@ nlookup(struct nlookupdata *nd)
 	    nd->nl_nch = nch;		/* remains locked */
 
 	    /*
-	     * Fast-track termination.  There is no parent directory of
-	     * the root in the same mount from the point of view of
-	     * the caller so return EPERM if NLC_REFDVP is specified.
-	     * e.g. 'rmdir /' is not allowed.
+	     * Fast-track termination. In the case of '/', there is no 
+	     * parent directory from the point of view of the caller 
+	     * so return either EPERM if NLC_REFDVP is specified.
+	     * e.g. 'rmdir /' is not allowed, or return EEXIST
+	     * for the case of 'mkdir /'.
 	     */
 	    if (*ptr == 0) {
 		if (nd->nl_flags & NLC_REFDVP)
-			error = EPERM;
+			error = (nd->nl_flags & NLC_CREATE) ? EEXIST : EPERM;
 		else
 			error = 0;
 		break;